Furnace.



A. NILSON.

FURNACE.

' APPLICATION HLED JAN-19, 1911.

Patented Dec. 10, 1918.

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A. NILSON.

FURNACE. APPLICATION FILED JAN. 19. 1911..

1,287,081. Pat ented' Dec. 10, 1918.

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ANDREW NILSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE EUREKA SMOKELESS FURNACE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

summon.

Specification of Letters Patent.

Patented Dec. 10, 1918.

Application filed January 19, 1917. Serial No, 143,228.

which a baffle wall or similar structure is used. My invention concerns itself more particularly with means for supporting such a baflie wall or similar structure. In proriding supporting means of this nature it must be borne in mind that the supporting means is utilized at a zone of intense heat and that therefore the construction must be such as to withstand this heat in the con tinued operation of the furnace.

The supporting means which I have designed contemplate a tube or like structure having water therein for the purposes of cooling. This water is ofcourse desirably the same water that is used for the furnace proper. When using the water from the furnace, this support is of course connected so that it communicates with the interior of the water chamber of the furnace.

In many trials it has been found that the mere connection of such a support between the water legs of the boiler does not accomplish the desired end, in that, this supporting structure happens to be at a portion of intense heat and the tendency of the water therein to flow in opposite directions fails to provide a fresh supply of cooling water. The heating of this supporting structure or bridge therein then continues until the heat becomes too great for the said bridge to stand and it buckles under the Weight of the bafiie wall or other structure placed thereon.

My invention herein concerns itself with the arrangement of such a water cooled bridge so that proper circulation may be had, whereby the said bridge may maintain its condition even though it is continuously within the zone of probably the most intense heat, the construction of the bridge support being such that it can be readily mounted in place in boilers in operation, or may be readily taken out and replaced.

I will explain my invention more in detail by referring to the accompanying drawings illustrating the same, in which:

Figure 1 is a transverse sectional view of a furnace showing my improved bridge structure;

Fig. 2 is a sectional view on line 22 of Fig. 1;

Fig. 3 is a side view partly in section of the furnace shown in Fig. 1, and

Fig. 4 is a fragmentary perspective view illustrating a portion of the baffle wall structure.

Referring to the drawings, I show a furnace structure having the grate 10 above which there is what I might call the fuel chamber 11 and combustion chamber 12. The boiler 13 has the water legs 14, 14 as customary therein. The fuel 15 is shown as disposed upon the grate partially closing the space from the grate upwardly to a bafiie wall structure 16. This bafile wall structure in the particular embodiment here in closes the space from the fuel upwardly through the boiler and consists substantially of masonry 17 and tile elements 18 and 19 respectively. The tile elements 18 and 19 are so arranged that they provide channels 20 whereby the gases may flow from the fuel chamber through the baflie wall into the combustion chamber. The supporting means maintaining this baflie wall in position are the subject matter of my present invention. These supporting means include a tube 21 which tube directly supports this baflie wall structure, it being desirable in the particular embodiment herein to provide a groove 22 in the tile elements 18 to accommodate this tube 21. The tube 21 at its left hand extremity (Fig. 1) communicates directly with the interior of the left hand water leg 14. The tube, however, does not communicate with the right hand water leg 14 but extends therethrough and communicates with the lower portion of the right hand water leg 14 as shown at 23 through the interposition of the connecting tube 24. Of course, the tube 21 when it passes through the right hand water leg 14 is expanded so as to prevent leakage. In order to properly expand the supporting structure when it engages the walls of the water leg, I provide extension tubes 25 and 26 which project outwardly through the wall 27 of the furnace. Suitable caps 28 are then provided to close up these tubes 25,

and 26.

Withthe-structure asithus outlinediit will be readily apparent-that .the heating of i the Water in the tube 21 causes the results in a circulation as the cooler water is drawn from the lower portion of the right hand water leg 14 and this water -may circulate upwardly into the left hand ,water leg 14 (Fig, 1). Of course it is not necessary, as will be obvious to those skilled in the artgto use the specific portions of the water legs herein shown from which to ,draw the. water in which to i create circulation as any other suitab portions of h furnac P oper wh differences of temperature exist can .be as readily chosen.

Having however thus described one form whi h my invention may take, Wh Ir a m as new and -;desire c-to secure by Letters Patent is:

and said tube .at {its projection through the said other water leg having a watertight connection with the two walls of said other water leg, a second tube secured to the outer wallvof the second water leg, and a connecting tube between .saidsecond tube and the 1 proj ectingportionof theffirst aforesaid tube,

2. Ina boiler having water legs, a tubular support for a bafiie wall orsiinilar structure, consisting of .a tube connectedv .toythe inner wall of one of said water legstof the boiler and projecting through the other water leg, the interior of said tube at said connection with the inner wall aforesaid communicating thereat with the interior of the boiler, and said tube at its projection through the said other water leg having a watertight connection with the two walls of said other water leg, a second tube secured to the outer wall of the second water leg, a connecting tube between said second tube and the projecting portion of the first aforesaid tube, and T connections interposed between said connecting-tube and-said other tubes- 3. lnaboiler having water legs, a tubular supportfor-arbaflie wall-or similar structure,;cons1sting;of a tube connected to the inner wall =of one of said water legs of the "boiler and projecting through the other water *leg, the interior of said tube at said connectlon with the inner wall aforesaid communicating thereat with the interior of the boiler, and said tube at ts projection through the said other water leg having a watertight connection with the two walls of said other water leg, a second tube secured to the outer wallof the second water leg, a connecting tube between said second tube and the projecting portion of the first aforesaid tube, 'T-connections interposed between said connecting tube and said other tubes, and additional tubes projecting from said T connections exteriorly of said boiler.

In witness whereof, I hereunto subscribe anyname this 16th day of December, A. D.,

I ANDRETW 'NILSON.

Witnesses HA EL VA. 7 J ONES, MAX W; ZABEL.

Copies vofjchis,patentJnay beiobtainedefor five,cents each, byeddressing the Commissioner of Patents,

- Washington, D. 0; 

